Year	Percent
1950	26.7758
1955	27.7847
1960	27.45396
1965	26.07167
1970	25.08849
1975	25.94582
1980	26.95047
1985	27.39671
1990	28.69124
1995	29.75621
2000	31.33215
2005	33.34986
2010	34.83152
2015	35.27272
2020	34.38297
2025	32.37218
2030	30.99135
2035	30.55358
2040	30.27064
2045	29.9549
2050	29.23686
2055	27.98226
2060	26.90732
2065	26.13211
2070	25.58492
2075	25.0971
2080	24.55636
2085	23.96426
2090	23.41498
2095	22.99206
2100	22.70495